+int set_filters __P((struct bpf_program *pass, struct bpf_program *active));
+ /* Set filter programs in kernel */
+
+/* Procedures exported from options.c */
+int parse_args __P((int argc, char **argv));
+ /* Parse options from arguments given */
+void usage __P((void)); /* Print a usage message */
+int options_from_file __P((char *filename, int must_exist, int check_prot));
+ /* Parse options from an options file */
+int options_from_user __P((void)); /* Parse options from user's .ppprc */
+int options_for_tty __P((void)); /* Parse options from /etc/ppp/options.tty */
+int getword __P((FILE *f, char *word, int *newlinep, char *filename));
+ /* Read a word from a file */